Junger Audio C8491 - Compact Card - Manual (Page 15)

digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
C8491
page 15/21
DSP 2B – 5.1 + 2 mode
If you have bought the surround option you will get the option to do an upmix either for permanent
operation or as an fail over feature to maintain a surround image if the input surround signal
disappears. Also a downmix block is available that can be used to feed a stereo program path or it may
be used as a fail over source.
Beside the upmix algorithm the upmix block has a surround detector that will decide if an input
surround signal has disappeared under certain conditions:
Failover C [Primary / Secondary / AUTO]
It can be used to provide a two stage fail over in case of upmix.
The upmix source signal can be either the incoming L/R surround pair.
If this is driven by an upstream Dolby E decoder and the signal
changes from surround to PCM stereo this stereo will be used as an
upmix source. But it may also be desirable that in case surround fails a
different input must be used as the upmix source.